added parameter total_time to decoder_initialized()

Similar to the previous patch: pass total_time instead of manipulating
dc->totalTime directly.

src/decoder_api.c

@@ -25,7 +25,8 @@
 #include "gcc.h"
 
 void decoder_initialized(mpd_unused struct decoder * decoder,
-			 const AudioFormat * audio_format)
+			 const AudioFormat * audio_format,
+			 float total_time)
 {
 	assert(dc.state == DECODE_STATE_START);
 
@@ -35,6 +36,8 @@ void decoder_initialized(mpd_unused struct decoder * decoder,
 				     &(ob.audioFormat));
 	}
 
+	dc.totalTime = total_time;
+
 	dc.state = DECODE_STATE_DECODE;
 	notify_signal(&pc.notify);
 }